rule win_protonbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.protonbot."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.protonbot"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 57 50 8d45f4 64a300000000 8bf1 6a04 c745fc01000000 }
            // n = 7, score = 400
            //   57                   | push                edi
            //   50                   | push                eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8bf1                 | mov                 esi, ecx
            //   6a04                 | push                4
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1

        $sequence_1 = { 83feff 7429 83bdb8feffff10 8d8da4feffff 56 }
            // n = 5, score = 400
            //   83feff               | cmp                 esi, -1
            //   7429                 | je                  0x2b
            //   83bdb8feffff10       | cmp                 dword ptr [ebp - 0x148], 0x10
            //   8d8da4feffff         | lea                 ecx, [ebp - 0x15c]
            //   56                   | push                esi

        $sequence_2 = { 8d85a0fbffff 0f4385a0fbffff 50 ffb584fbffff }
            // n = 4, score = 400
            //   8d85a0fbffff         | lea                 eax, [ebp - 0x460]
            //   0f4385a0fbffff       | cmovae              eax, dword ptr [ebp - 0x460]
            //   50                   | push                eax
            //   ffb584fbffff         | push                dword ptr [ebp - 0x47c]

        $sequence_3 = { 2bca 8d85f0f7ffff 51 50 6a31 }
            // n = 5, score = 400
            //   2bca                 | sub                 ecx, edx
            //   8d85f0f7ffff         | lea                 eax, [ebp - 0x810]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   6a31                 | push                0x31

        $sequence_4 = { 56 ff15???????? 6a0a ffd3 6a00 }
            // n = 5, score = 400
            //   56                   | push                esi
            //   ff15????????         |                     
            //   6a0a                 | push                0xa
            //   ffd3                 | call                ebx
            //   6a00                 | push                0

        $sequence_5 = { 837d1c10 8d4d08 0f434d08 51 ff15???????? a3???????? }
            // n = 6, score = 400
            //   837d1c10             | cmp                 dword ptr [ebp + 0x1c], 0x10
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   0f434d08             | cmovae              ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   a3????????           |                     

        $sequence_6 = { c7859cfeffff00000000 0f4395bcfeffff 8bca c785a0feffff0f000000 c6858cfeffff00 8d7101 }
            // n = 6, score = 400
            //   c7859cfeffff00000000     | mov    dword ptr [ebp - 0x164], 0
            //   0f4395bcfeffff       | cmovae              edx, dword ptr [ebp - 0x144]
            //   8bca                 | mov                 ecx, edx
            //   c785a0feffff0f000000     | mov    dword ptr [ebp - 0x160], 0xf
            //   c6858cfeffff00       | mov                 byte ptr [ebp - 0x174], 0
            //   8d7101               | lea                 esi, [ecx + 1]

        $sequence_7 = { e8???????? 83c404 50 ff15???????? 8b1d???????? be02000000 66a3???????? }
            // n = 7, score = 400
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b1d????????         |                     
            //   be02000000           | mov                 esi, 2
            //   66a3????????         |                     

        $sequence_8 = { 8bd0 c745d4ffffffff 899554ecffff b901000000 8bc2 c1e81e 33c2 }
            // n = 7, score = 400
            //   8bd0                 | mov                 edx, eax
            //   c745d4ffffffff       | mov                 dword ptr [ebp - 0x2c], 0xffffffff
            //   899554ecffff         | mov                 dword ptr [ebp - 0x13ac], edx
            //   b901000000           | mov                 ecx, 1
            //   8bc2                 | mov                 eax, edx
            //   c1e81e               | shr                 eax, 0x1e
            //   33c2                 | xor                 eax, edx

        $sequence_9 = { c785a0feffff0f000000 c6858cfeffff00 8d7101 8a01 41 84c0 }
            // n = 6, score = 400
            //   c785a0feffff0f000000     | mov    dword ptr [ebp - 0x160], 0xf
            //   c6858cfeffff00       | mov                 byte ptr [ebp - 0x174], 0
            //   8d7101               | lea                 esi, [ecx + 1]
            //   8a01                 | mov                 al, byte ptr [ecx]
            //   41                   | inc                 ecx
            //   84c0                 | test                al, al

    condition:
        7 of them and filesize < 1073152
}